Arithmeticall questions : touching the buying or exchange of annuities; taking of leases for fines, or yearly rent; purchase of fee-simples; dealing for present or future possessions; and other bargains and accounts, wherein allowance for disbursing or forbearance of mony is intended: briefly resolved, by meanes of certain breviats. Calculated by R.W. of London, practitioner in the art of numbers. To which are added sundry sorts of breviats after the rate of 8 per cent. per ann. By Thomas Fisher.